define("ace/occur", ["require", "exports", "module", "ace/lib/oop", "ace/range", "ace/search", "ace/edit_session", "ace/search_highlight", "ace/lib/dom"], function (require, exports, module) {
    "use strict";

    var oop = require("./lib/oop");
    var Range = require("./range").Range;
    var Search = require("./search").Search;
    var EditSession = require("./edit_session").EditSession;
    var SearchHighlight = require("./search_highlight").SearchHighlight;

    function Occur() {
    }

    oop.inherits(Occur, Search);

    (function () {
        this.enter = function (editor, options) {
            if (!options.needle) return false;
            var pos = editor.getCursorPosition();
            this.displayOccurContent(editor, options);
            var translatedPos = this.originalToOccurPosition(editor.session, pos);
            editor.moveCursorToPosition(translatedPos);
            return true;
        };
        this.exit = function (editor, options) {
            var pos = options.translatePosition && editor.getCursorPosition();
            var translatedPos = pos && this.occurToOriginalPosition(editor.session, pos);
            this.displayOriginalContent(editor);
            if (translatedPos)
                editor.moveCursorToPosition(translatedPos);
            return true;
        };

        this.highlight = function (sess, regexp) {
            var hl = sess.$occurHighlight = sess.$occurHighlight || sess.addDynamicMarker(
                new SearchHighlight(null, "ace_occur-highlight", "text"));
            hl.setRegexp(regexp);
            sess._emit("changeBackMarker"); // force highlight layer redraw
        };

        this.displayOccurContent = function (editor, options) {
            this.$originalSession = editor.session;
            var found = this.matchingLines(editor.session, options);
            var lines = found.map(function (foundLine) {
                return foundLine.content;
            });
            var occurSession = new EditSession(lines.join('\n'));
            occurSession.$occur = this;
            occurSession.$occurMatchingLines = found;
            editor.setSession(occurSession);
            this.$useEmacsStyleLineStart = this.$originalSession.$useEmacsStyleLineStart;
            occurSession.$useEmacsStyleLineStart = this.$useEmacsStyleLineStart;
            this.highlight(occurSession, options.re);
            occurSession._emit('changeBackMarker');
        };

        this.displayOriginalContent = function (editor) {
            editor.setSession(this.$originalSession);
            this.$originalSession.$useEmacsStyleLineStart = this.$useEmacsStyleLineStart;
        };
        this.originalToOccurPosition = function (session, pos) {
            var lines = session.$occurMatchingLines;
            var nullPos = {row: 0, column: 0};
            if (!lines) return nullPos;
            for (var i = 0; i < lines.length; i++) {
                if (lines[i].row === pos.row)
                    return {row: i, column: pos.column};
            }
            return nullPos;
        };
        this.occurToOriginalPosition = function (session, pos) {
            var lines = session.$occurMatchingLines;
            if (!lines || !lines[pos.row])
                return pos;
            return {row: lines[pos.row].row, column: pos.column};
        };

        this.matchingLines = function (session, options) {
            options = oop.mixin({}, options);
            if (!session || !options.needle) return [];
            var search = new Search();
            search.set(options);
            return search.findAll(session).reduce(function (lines, range) {
                var row = range.start.row;
                var last = lines[lines.length - 1];
                return last && last.row === row ?
                    lines :
                    lines.concat({row: row, content: session.getLine(row)});
            }, []);
        };

    }).call(Occur.prototype);

    var dom = require('./lib/dom');
    dom.importCssString(".ace_occur-highlight {\n\
    border-radius: 4px;\n\
    background-color: rgba(87, 255, 8, 0.25);\n\
    position: absolute;\n\
    z-index: 4;\n\
    -moz-box-sizing: border-box;\n\
    -webkit-box-sizing: border-box;\n\
    box-sizing: border-box;\n\
    box-shadow: 0 0 4px rgb(91, 255, 50);\n\
}\n\
.ace_dark .ace_occur-highlight {\n\
    background-color: rgb(80, 140, 85);\n\
    box-shadow: 0 0 4px rgb(60, 120, 70);\n\
}\n", "incremental-occur-highlighting");

    exports.Occur = Occur;

});

define("ace/commands/occur_commands", ["require", "exports", "module", "ace/config", "ace/occur", "ace/keyboard/hash_handler", "ace/lib/oop"], function (require, exports, module) {

    var config = require("../config"),
        Occur = require("../occur").Occur;
    var occurStartCommand = {
        name: "occur",
        exec: function (editor, options) {
            var alreadyInOccur = !!editor.session.$occur;
            var occurSessionActive = new Occur().enter(editor, options);
            if (occurSessionActive && !alreadyInOccur)
                OccurKeyboardHandler.installIn(editor);
        },
        readOnly: true
    };

    var occurCommands = [{
        name: "occurexit",
        bindKey: 'esc|Ctrl-G',
        exec: function (editor) {
            var occur = editor.session.$occur;
            if (!occur) return;
            occur.exit(editor, {});
            if (!editor.session.$occur) OccurKeyboardHandler.uninstallFrom(editor);
        },
        readOnly: true
    }, {
        name: "occuraccept",
        bindKey: 'enter',
        exec: function (editor) {
            var occur = editor.session.$occur;
            if (!occur) return;
            occur.exit(editor, {translatePosition: true});
            if (!editor.session.$occur) OccurKeyboardHandler.uninstallFrom(editor);
        },
        readOnly: true
    }];

    var HashHandler = require("../keyboard/hash_handler").HashHandler;
    var oop = require("../lib/oop");


    function OccurKeyboardHandler() {
    }

    oop.inherits(OccurKeyboardHandler, HashHandler);

    (function () {

        this.isOccurHandler = true;

        this.attach = function (editor) {
            HashHandler.call(this, occurCommands, editor.commands.platform);
            this.$editor = editor;
        };

        var handleKeyboard$super = this.handleKeyboard;
        this.handleKeyboard = function (data, hashId, key, keyCode) {
            var cmd = handleKeyboard$super.call(this, data, hashId, key, keyCode);
            return (cmd && cmd.command) ? cmd : undefined;
        };

    }).call(OccurKeyboardHandler.prototype);

    OccurKeyboardHandler.installIn = function (editor) {
        var handler = new this();
        editor.keyBinding.addKeyboardHandler(handler);
        editor.commands.addCommands(occurCommands);
    };

    OccurKeyboardHandler.uninstallFrom = function (editor) {
        editor.commands.removeCommands(occurCommands);
        var handler = editor.getKeyboardHandler();
        if (handler.isOccurHandler)
            editor.keyBinding.removeKeyboardHandler(handler);
    };

    exports.occurStartCommand = occurStartCommand;

});

define("ace/commands/incremental_search_commands", ["require", "exports", "module", "ace/config", "ace/lib/oop", "ace/keyboard/hash_handler", "ace/commands/occur_commands"], function (require, exports, module) {

    var config = require("../config");
    var oop = require("../lib/oop");
    var HashHandler = require("../keyboard/hash_handler").HashHandler;
    var occurStartCommand = require("./occur_commands").occurStartCommand;
    exports.iSearchStartCommands = [{
        name: "iSearch",
        bindKey: {win: "Ctrl-F", mac: "Command-F"},
        exec: function (editor, options) {
            config.loadModule(["core", "ace/incremental_search"], function (e) {
                var iSearch = e.iSearch = e.iSearch || new e.IncrementalSearch();
                iSearch.activate(editor, options.backwards);
                if (options.jumpToFirstMatch) iSearch.next(options);
            });
        },
        readOnly: true
    }, {
        name: "iSearchBackwards",
        exec: function (editor, jumpToNext) {
            editor.execCommand('iSearch', {backwards: true});
        },
        readOnly: true
    }, {
        name: "iSearchAndGo",
        bindKey: {win: "Ctrl-K", mac: "Command-G"},
        exec: function (editor, jumpToNext) {
            editor.execCommand('iSearch', {jumpToFirstMatch: true, useCurrentOrPrevSearch: true});
        },
        readOnly: true
    }, {
        name: "iSearchBackwardsAndGo",
        bindKey: {win: "Ctrl-Shift-K", mac: "Command-Shift-G"},
        exec: function (editor) {
            editor.execCommand('iSearch', {jumpToFirstMatch: true, backwards: true, useCurrentOrPrevSearch: true});
        },
        readOnly: true
    }];
    exports.iSearchCommands = [{
        name: "restartSearch",
        bindKey: {win: "Ctrl-F", mac: "Command-F"},
        exec: function (iSearch) {
            iSearch.cancelSearch(true);
        }
    }, {
        name: "searchForward",
        bindKey: {win: "Ctrl-S|Ctrl-K", mac: "Ctrl-S|Command-G"},
        exec: function (iSearch, options) {
            options.useCurrentOrPrevSearch = true;
            iSearch.next(options);
        }
    }, {
        name: "searchBackward",
        bindKey: {win: "Ctrl-R|Ctrl-Shift-K", mac: "Ctrl-R|Command-Shift-G"},
        exec: function (iSearch, options) {
            options.useCurrentOrPrevSearch = true;
            options.backwards = true;
            iSearch.next(options);
        }
    }, {
        name: "extendSearchTerm",
        exec: function (iSearch, string) {
            iSearch.addString(string);
        }
    }, {
        name: "extendSearchTermSpace",
        bindKey: "space",
        exec: function (iSearch) {
            iSearch.addString(' ');
        }
    }, {
        name: "shrinkSearchTerm",
        bindKey: "backspace",
        exec: function (iSearch) {
            iSearch.removeChar();
        }
    }, {
        name: 'confirmSearch',
        bindKey: 'return',
        exec: function (iSearch) {
            iSearch.deactivate();
        }
    }, {
        name: 'cancelSearch',
        bindKey: 'esc|Ctrl-G',
        exec: function (iSearch) {
            iSearch.deactivate(true);
        }
    }, {
        name: 'occurisearch',
        bindKey: 'Ctrl-O',
        exec: function (iSearch) {
            var options = oop.mixin({}, iSearch.$options);
            iSearch.deactivate();
            occurStartCommand.exec(iSearch.$editor, options);
        }
    }, {
        name: "yankNextWord",
        bindKey: "Ctrl-w",
        exec: function (iSearch) {
            var ed = iSearch.$editor,
                range = ed.selection.getRangeOfMovements(function (sel) {
                    sel.moveCursorWordRight();
                }),
                string = ed.session.getTextRange(range);
            iSearch.addString(string);
        }
    }, {
        name: "yankNextChar",
        bindKey: "Ctrl-Alt-y",
        exec: function (iSearch) {
            var ed = iSearch.$editor,
                range = ed.selection.getRangeOfMovements(function (sel) {
                    sel.moveCursorRight();
                }),
                string = ed.session.getTextRange(range);
            iSearch.addString(string);
        }
    }, {
        name: 'recenterTopBottom',
        bindKey: 'Ctrl-l',
        exec: function (iSearch) {
            iSearch.$editor.execCommand('recenterTopBottom');
        }
    }, {
        name: 'selectAllMatches',
        bindKey: 'Ctrl-space',
        exec: function (iSearch) {
            var ed = iSearch.$editor,
                hl = ed.session.$isearchHighlight,
                ranges = hl && hl.cache ? hl.cache
                    .reduce(function (ranges, ea) {
                        return ranges.concat(ea ? ea : []);
                    }, []) : [];
            iSearch.deactivate(false);
            ranges.forEach(ed.selection.addRange.bind(ed.selection));
        }
    }, {
        name: 'searchAsRegExp',
        bindKey: 'Alt-r',
        exec: function (iSearch) {
            iSearch.convertNeedleToRegExp();
        }
    }].map(function (cmd) {
        cmd.readOnly = true;
        cmd.isIncrementalSearchCommand = true;
        cmd.scrollIntoView = "animate-cursor";
        return cmd;
    });

    function IncrementalSearchKeyboardHandler(iSearch) {
        this.$iSearch = iSearch;
    }

    oop.inherits(IncrementalSearchKeyboardHandler, HashHandler);

    (function () {

        this.attach = function (editor) {
            var iSearch = this.$iSearch;
            HashHandler.call(this, exports.iSearchCommands, editor.commands.platform);
            this.$commandExecHandler = editor.commands.addEventListener('exec', function (e) {
                if (!e.command.isIncrementalSearchCommand)
                    return iSearch.deactivate();
                e.stopPropagation();
                e.preventDefault();
                var scrollTop = editor.session.getScrollTop();
                var result = e.command.exec(iSearch, e.args || {});
                editor.renderer.scrollCursorIntoView(null, 0.5);
                editor.renderer.animateScrolling(scrollTop);
                return result;
            });
        };

        this.detach = function (editor) {
            if (!this.$commandExecHandler) return;
            editor.commands.removeEventListener('exec', this.$commandExecHandler);
            delete this.$commandExecHandler;
        };

        var handleKeyboard$super = this.handleKeyboard;
        this.handleKeyboard = function (data, hashId, key, keyCode) {
            if (((hashId === 1/*ctrl*/ || hashId === 8/*command*/) && key === 'v')
                || (hashId === 1/*ctrl*/ && key === 'y')) return null;
            var cmd = handleKeyboard$super.call(this, data, hashId, key, keyCode);
            if (cmd.command) {
                return cmd;
            }
            if (hashId == -1) {
                var extendCmd = this.commands.extendSearchTerm;
                if (extendCmd) {
                    return {command: extendCmd, args: key};
                }
            }
            return false;
        };

    }).call(IncrementalSearchKeyboardHandler.prototype);


    exports.IncrementalSearchKeyboardHandler = IncrementalSearchKeyboardHandler;

});

define("ace/incremental_search", ["require", "exports", "module", "ace/lib/oop", "ace/range", "ace/search", "ace/search_highlight", "ace/commands/incremental_search_commands", "ace/lib/dom", "ace/commands/command_manager", "ace/editor", "ace/config"], function (require, exports, module) {
    "use strict";

    var oop = require("./lib/oop");
    var Range = require("./range").Range;
    var Search = require("./search").Search;
    var SearchHighlight = require("./search_highlight").SearchHighlight;
    var iSearchCommandModule = require("./commands/incremental_search_commands");
    var ISearchKbd = iSearchCommandModule.IncrementalSearchKeyboardHandler;

    function IncrementalSearch() {
        this.$options = {wrap: false, skipCurrent: false};
        this.$keyboardHandler = new ISearchKbd(this);
    }

    oop.inherits(IncrementalSearch, Search);

    function isRegExp(obj) {
        return obj instanceof RegExp;
    }

    function regExpToObject(re) {
        var string = String(re),
            start = string.indexOf('/'),
            flagStart = string.lastIndexOf('/');
        return {
            expression: string.slice(start + 1, flagStart),
            flags: string.slice(flagStart + 1)
        };
    }

    function stringToRegExp(string, flags) {
        try {
            return new RegExp(string, flags);
        } catch (e) {
            return string;
        }
    }

    function objectToRegExp(obj) {
        return stringToRegExp(obj.expression, obj.flags);
    }

    (function () {

        this.activate = function (ed, backwards) {
            this.$editor = ed;
            this.$startPos = this.$currentPos = ed.getCursorPosition();
            this.$options.needle = '';
            this.$options.backwards = backwards;
            ed.keyBinding.addKeyboardHandler(this.$keyboardHandler);
            this.$originalEditorOnPaste = ed.onPaste;
            ed.onPaste = this.onPaste.bind(this);
            this.$mousedownHandler = ed.addEventListener('mousedown', this.onMouseDown.bind(this));
            this.selectionFix(ed);
            this.statusMessage(true);
        };

        this.deactivate = function (reset) {
            this.cancelSearch(reset);
            var ed = this.$editor;
            ed.keyBinding.removeKeyboardHandler(this.$keyboardHandler);
            if (this.$mousedownHandler) {
                ed.removeEventListener('mousedown', this.$mousedownHandler);
                delete this.$mousedownHandler;
            }
            ed.onPaste = this.$originalEditorOnPaste;
            this.message('');
        };

        this.selectionFix = function (editor) {
            if (editor.selection.isEmpty() && !editor.session.$emacsMark) {
                editor.clearSelection();
            }
        };

        this.highlight = function (regexp) {
            var sess = this.$editor.session,
                hl = sess.$isearchHighlight = sess.$isearchHighlight || sess.addDynamicMarker(
                    new SearchHighlight(null, "ace_isearch-result", "text"));
            hl.setRegexp(regexp);
            sess._emit("changeBackMarker"); // force highlight layer redraw
        };

        this.cancelSearch = function (reset) {
            var e = this.$editor;
            this.$prevNeedle = this.$options.needle;
            this.$options.needle = '';
            if (reset) {
                e.moveCursorToPosition(this.$startPos);
                this.$currentPos = this.$startPos;
            } else {
                e.pushEmacsMark && e.pushEmacsMark(this.$startPos, false);
            }
            this.highlight(null);
            return Range.fromPoints(this.$currentPos, this.$currentPos);
        };

        this.highlightAndFindWithNeedle = function (moveToNext, needleUpdateFunc) {
            if (!this.$editor) return null;
            var options = this.$options;
            if (needleUpdateFunc) {
                options.needle = needleUpdateFunc.call(this, options.needle || '') || '';
            }
            if (options.needle.length === 0) {
                this.statusMessage(true);
                return this.cancelSearch(true);
            }
            options.start = this.$currentPos;
            var session = this.$editor.session,
                found = this.find(session),
                shouldSelect = this.$editor.emacsMark ?
                    !!this.$editor.emacsMark() : !this.$editor.selection.isEmpty();
            if (found) {
                if (options.backwards) found = Range.fromPoints(found.end, found.start);
                this.$editor.selection.setRange(Range.fromPoints(shouldSelect ? this.$startPos : found.end, found.end));
                if (moveToNext) this.$currentPos = found.end;
                this.highlight(options.re);
            }

            this.statusMessage(found);

            return found;
        };

        this.addString = function (s) {
            return this.highlightAndFindWithNeedle(false, function (needle) {
                if (!isRegExp(needle))
                    return needle + s;
                var reObj = regExpToObject(needle);
                reObj.expression += s;
                return objectToRegExp(reObj);
            });
        };

        this.removeChar = function (c) {
            return this.highlightAndFindWithNeedle(false, function (needle) {
                if (!isRegExp(needle))
                    return needle.substring(0, needle.length - 1);
                var reObj = regExpToObject(needle);
                reObj.expression = reObj.expression.substring(0, reObj.expression.length - 1);
                return objectToRegExp(reObj);
            });
        };

        this.next = function (options) {
            options = options || {};
            this.$options.backwards = !!options.backwards;
            this.$currentPos = this.$editor.getCursorPosition();
            return this.highlightAndFindWithNeedle(true, function (needle) {
                return options.useCurrentOrPrevSearch && needle.length === 0 ?
                    this.$prevNeedle || '' : needle;
            });
        };

        this.onMouseDown = function (evt) {
            this.deactivate();
            return true;
        };

        this.onPaste = function (text) {
            this.addString(text);
        };

        this.convertNeedleToRegExp = function () {
            return this.highlightAndFindWithNeedle(false, function (needle) {
                return isRegExp(needle) ? needle : stringToRegExp(needle, 'ig');
            });
        };

        this.convertNeedleToString = function () {
            return this.highlightAndFindWithNeedle(false, function (needle) {
                return isRegExp(needle) ? regExpToObject(needle).expression : needle;
            });
        };

        this.statusMessage = function (found) {
            var options = this.$options, msg = '';
            msg += options.backwards ? 'reverse-' : '';
            msg += 'isearch: ' + options.needle;
            msg += found ? '' : ' (not found)';
            this.message(msg);
        };

        this.message = function (msg) {
            if (this.$editor.showCommandLine) {
                this.$editor.showCommandLine(msg);
                this.$editor.focus();
            } else {
                console.log(msg);
            }
        };

    }).call(IncrementalSearch.prototype);


    exports.IncrementalSearch = IncrementalSearch;

    var dom = require('./lib/dom');
    dom.importCssString && dom.importCssString("\
.ace_marker-layer .ace_isearch-result {\
  position: absolute;\
  z-index: 6;\
  -moz-box-sizing: border-box;\
  -webkit-box-sizing: border-box;\
  box-sizing: border-box;\
}\
div.ace_isearch-result {\
  border-radius: 4px;\
  background-color: rgba(255, 200, 0, 0.5);\
  box-shadow: 0 0 4px rgb(255, 200, 0);\
}\
.ace_dark div.ace_isearch-result {\
  background-color: rgb(100, 110, 160);\
  box-shadow: 0 0 4px rgb(80, 90, 140);\
}", "incremental-search-highlighting");
    var commands = require("./commands/command_manager");
    (function () {
        this.setupIncrementalSearch = function (editor, val) {
            if (this.usesIncrementalSearch == val) return;
            this.usesIncrementalSearch = val;
            var iSearchCommands = iSearchCommandModule.iSearchStartCommands;
            var method = val ? 'addCommands' : 'removeCommands';
            this[method](iSearchCommands);
        };
    }).call(commands.CommandManager.prototype);
    var Editor = require("./editor").Editor;
    require("./config").defineOptions(Editor.prototype, "editor", {
        useIncrementalSearch: {
            set: function (val) {
                this.keyBinding.$handlers.forEach(function (handler) {
                    if (handler.setupIncrementalSearch) {
                        handler.setupIncrementalSearch(this, val);
                    }
                });
                this._emit('incrementalSearchSettingChanged', {isEnabled: val});
            }
        }
    });

});

define("ace/keyboard/emacs", ["require", "exports", "module", "ace/lib/dom", "ace/incremental_search", "ace/commands/incremental_search_commands", "ace/keyboard/hash_handler", "ace/lib/keys"], function (require, exports, module) {
    "use strict";

    var dom = require("../lib/dom");
    require("../incremental_search");
    var iSearchCommandModule = require("../commands/incremental_search_commands");


    var screenToTextBlockCoordinates = function (x, y) {
        var canvasPos = this.scroller.getBoundingClientRect();
        var offsetX = x + this.scrollLeft - canvasPos.left - this.$padding;

        var col = Math.floor(offsetX / this.characterWidth);

        var row = Math.floor(
            (y + this.scrollTop - canvasPos.top) / this.lineHeight
        );

        return this.session.screenToDocumentPosition(row, col, offsetX);
    };

    var HashHandler = require("./hash_handler").HashHandler;
    exports.handler = new HashHandler();

    exports.handler.isEmacs = true;
    exports.handler.$id = "ace/keyboard/emacs";

    var initialized = false;
    var $formerLongWords;
    var $formerLineStart;

    exports.handler.attach = function (editor) {
        if (!initialized) {
            initialized = true;
            dom.importCssString('\
            .emacs-mode .ace_cursor{\
                border: 1px rgba(50,250,50,0.8) solid!important;\
                -moz-box-sizing: border-box!important;\
                -webkit-box-sizing: border-box!important;\
                box-sizing: border-box!important;\
                background-color: rgba(0,250,0,0.9);\
                opacity: 0.5;\
            }\
            .emacs-mode .ace_hidden-cursors .ace_cursor{\
                opacity: 1;\
                background-color: transparent;\
            }\
            .emacs-mode .ace_overwrite-cursors .ace_cursor {\
                opacity: 1;\
                background-color: transparent;\
                border-width: 0 0 2px 2px !important;\
            }\
            .emacs-mode .ace_text-layer {\
                z-index: 4\
            }\
            .emacs-mode .ace_cursor-layer {\
                z-index: 2\
            }', 'emacsMode'
            );
        }
        $formerLongWords = editor.session.$selectLongWords;
        editor.session.$selectLongWords = true;
        $formerLineStart = editor.session.$useEmacsStyleLineStart;
        editor.session.$useEmacsStyleLineStart = true;

        editor.session.$emacsMark = null; // the active mark
        editor.session.$emacsMarkRing = editor.session.$emacsMarkRing || [];

        editor.emacsMark = function () {
            return this.session.$emacsMark;
        };

        editor.setEmacsMark = function (p) {
            this.session.$emacsMark = p;
        };

        editor.pushEmacsMark = function (p, activate) {
            var prevMark = this.session.$emacsMark;
            if (prevMark)
                this.session.$emacsMarkRing.push(prevMark);
            if (!p || activate) this.setEmacsMark(p);
            else this.session.$emacsMarkRing.push(p);
        };

        editor.popEmacsMark = function () {
            var mark = this.emacsMark();
            if (mark) {
                this.setEmacsMark(null);
                return mark;
            }
            return this.session.$emacsMarkRing.pop();
        };

        editor.getLastEmacsMark = function (p) {
            return this.session.$emacsMark || this.session.$emacsMarkRing.slice(-1)[0];
        };

        editor.emacsMarkForSelection = function (replacement) {
            var sel = this.selection,
                multiRangeLength = this.multiSelect ?
                    this.multiSelect.getAllRanges().length : 1,
                selIndex = sel.index || 0,
                markRing = this.session.$emacsMarkRing,
                markIndex = markRing.length - (multiRangeLength - selIndex),
                lastMark = markRing[markIndex] || sel.anchor;
            if (replacement) {
                markRing.splice(markIndex, 1,
                    "row" in replacement && "column" in replacement ?
                        replacement : undefined);
            }
            return lastMark;
        };

        editor.on("click", $resetMarkMode);
        editor.on("changeSession", $kbSessionChange);
        editor.renderer.screenToTextCoordinates = screenToTextBlockCoordinates;
        editor.setStyle("emacs-mode");
        editor.commands.addCommands(commands);
        exports.handler.platform = editor.commands.platform;
        editor.$emacsModeHandler = this;
        editor.addEventListener('copy', this.onCopy);
        editor.addEventListener('paste', this.onPaste);
    };

    exports.handler.detach = function (editor) {
        delete editor.renderer.screenToTextCoordinates;
        editor.session.$selectLongWords = $formerLongWords;
        editor.session.$useEmacsStyleLineStart = $formerLineStart;
        editor.removeEventListener("click", $resetMarkMode);
        editor.removeEventListener("changeSession", $kbSessionChange);
        editor.unsetStyle("emacs-mode");
        editor.commands.removeCommands(commands);
        editor.removeEventListener('copy', this.onCopy);
        editor.removeEventListener('paste', this.onPaste);
        editor.$emacsModeHandler = null;
    };

    var $kbSessionChange = function (e) {
        if (e.oldSession) {
            e.oldSession.$selectLongWords = $formerLongWords;
            e.oldSession.$useEmacsStyleLineStart = $formerLineStart;
        }

        $formerLongWords = e.session.$selectLongWords;
        e.session.$selectLongWords = true;
        $formerLineStart = e.session.$useEmacsStyleLineStart;
        e.session.$useEmacsStyleLineStart = true;

        if (!e.session.hasOwnProperty('$emacsMark'))
            e.session.$emacsMark = null;
        if (!e.session.hasOwnProperty('$emacsMarkRing'))
            e.session.$emacsMarkRing = [];
    };

    var $resetMarkMode = function (e) {
        e.editor.session.$emacsMark = null;
    };

    var keys = require("../lib/keys").KEY_MODS;
    var eMods = {C: "ctrl", S: "shift", M: "alt", CMD: "command"};
    var combinations = ["C-S-M-CMD",
        "S-M-CMD", "C-M-CMD", "C-S-CMD", "C-S-M",
        "M-CMD", "S-CMD", "S-M", "C-CMD", "C-M", "C-S",
        "CMD", "M", "S", "C"];
    combinations.forEach(function (c) {
        var hashId = 0;
        c.split("-").forEach(function (c) {
            hashId = hashId | keys[eMods[c]];
        });
        eMods[hashId] = c.toLowerCase() + "-";
    });

    exports.handler.onCopy = function (e, editor) {
        if (editor.$handlesEmacsOnCopy) return;
        editor.$handlesEmacsOnCopy = true;
        exports.handler.commands.killRingSave.exec(editor);
        editor.$handlesEmacsOnCopy = false;
    };

    exports.handler.onPaste = function (e, editor) {
        editor.pushEmacsMark(editor.getCursorPosition());
    };

    exports.handler.bindKey = function (key, command) {
        if (typeof key == "object")
            key = key[this.platform];
        if (!key)
            return;

        var ckb = this.commandKeyBinding;
        key.split("|").forEach(function (keyPart) {
            keyPart = keyPart.toLowerCase();
            ckb[keyPart] = command;
            var keyParts = keyPart.split(" ").slice(0, -1);
            keyParts.reduce(function (keyMapKeys, keyPart, i) {
                var prefix = keyMapKeys[i - 1] ? keyMapKeys[i - 1] + ' ' : '';
                return keyMapKeys.concat([prefix + keyPart]);
            }, []).forEach(function (keyPart) {
                if (!ckb[keyPart]) ckb[keyPart] = "null";
            });
        }, this);
    };

    exports.handler.getStatusText = function (editor, data) {
        var str = "";
        if (data.count)
            str += data.count;
        if (data.keyChain)
            str += " " + data.keyChain;
        return str;
    };

    exports.handler.handleKeyboard = function (data, hashId, key, keyCode) {
        if (keyCode === -1) return undefined;

        var editor = data.editor;
        editor._signal("changeStatus");
        if (hashId == -1) {
            editor.pushEmacsMark();
            if (data.count) {
                var str = new Array(data.count + 1).join(key);
                data.count = null;
                return {command: "insertstring", args: str};
            }
        }

        var modifier = eMods[hashId];
        if (modifier == "c-" || data.count) {
            var count = parseInt(key[key.length - 1]);
            if (typeof count === 'number' && !isNaN(count)) {
                data.count = Math.max(data.count, 0) || 0;
                data.count = 10 * data.count + count;
                return {command: "null"};
            }
        }
        if (modifier) key = modifier + key;
        if (data.keyChain) key = data.keyChain += " " + key;
        var command = this.commandKeyBinding[key];
        data.keyChain = command == "null" ? key : "";
        if (!command) return undefined;
        if (command === "null") return {command: "null"};

        if (command === "universalArgument") {
            data.count = -4;
            return {command: "null"};
        }
        var args;
        if (typeof command !== "string") {
            args = command.args;
            if (command.command) command = command.command;
            if (command === "goorselect") {
                command = editor.emacsMark() ? args[1] : args[0];
                args = null;
            }
        }

        if (typeof command === "string") {
            if (command === "insertstring" ||
                command === "splitline" ||
                command === "togglecomment") {
                editor.pushEmacsMark();
            }
            command = this.commands[command] || editor.commands.commands[command];
            if (!command) return undefined;
        }

        if (!command.readOnly && !command.isYank)
            data.lastCommand = null;

        if (!command.readOnly && editor.emacsMark())
            editor.setEmacsMark(null);

        if (data.count) {
            var count = data.count;
            data.count = 0;
            if (!command || !command.handlesCount) {
                return {
                    args: args,
                    command: {
                        exec: function (editor, args) {
                            for (var i = 0; i < count; i++)
                                command.exec(editor, args);
                        },
                        multiSelectAction: command.multiSelectAction
                    }
                };
            } else {
                if (!args) args = {};
                if (typeof args === 'object') args.count = count;
            }
        }

        return {command: command, args: args};
    };

    exports.emacsKeys = {
        "Up|C-p": {command: "goorselect", args: ["golineup", "selectup"]},
        "Down|C-n": {command: "goorselect", args: ["golinedown", "selectdown"]},
        "Left|C-b": {command: "goorselect", args: ["gotoleft", "selectleft"]},
        "Right|C-f": {command: "goorselect", args: ["gotoright", "selectright"]},
        "C-Left|M-b": {command: "goorselect", args: ["gotowordleft", "selectwordleft"]},
        "C-Right|M-f": {command: "goorselect", args: ["gotowordright", "selectwordright"]},
        "Home|C-a": {command: "goorselect", args: ["gotolinestart", "selecttolinestart"]},
        "End|C-e": {command: "goorselect", args: ["gotolineend", "selecttolineend"]},
        "C-Home|S-M-,": {command: "goorselect", args: ["gotostart", "selecttostart"]},
        "C-End|S-M-.": {command: "goorselect", args: ["gotoend", "selecttoend"]},
        "S-Up|S-C-p": "selectup",
        "S-Down|S-C-n": "selectdown",
        "S-Left|S-C-b": "selectleft",
        "S-Right|S-C-f": "selectright",
        "S-C-Left|S-M-b": "selectwordleft",
        "S-C-Right|S-M-f": "selectwordright",
        "S-Home|S-C-a": "selecttolinestart",
        "S-End|S-C-e": "selecttolineend",
        "S-C-Home": "selecttostart",
        "S-C-End": "selecttoend",

        "C-l": "recenterTopBottom",
        "M-s": "centerselection",
        "M-g": "gotoline",
        "C-x C-p": "selectall",
        "C-Down": {command: "goorselect", args: ["gotopagedown", "selectpagedown"]},
        "C-Up": {command: "goorselect", args: ["gotopageup", "selectpageup"]},
        "PageDown|C-v": {command: "goorselect", args: ["gotopagedown", "selectpagedown"]},
        "PageUp|M-v": {command: "goorselect", args: ["gotopageup", "selectpageup"]},
        "S-C-Down": "selectpagedown",
        "S-C-Up": "selectpageup",

        "C-s": "iSearch",
        "C-r": "iSearchBackwards",

        "M-C-s": "findnext",
        "M-C-r": "findprevious",
        "S-M-5": "replace",
        "Backspace": "backspace",
        "Delete|C-d": "del",
        "Return|C-m": {command: "insertstring", args: "\n"}, // "newline"
        "C-o": "splitline",

        "M-d|C-Delete": {command: "killWord", args: "right"},
        "C-Backspace|M-Backspace|M-Delete": {command: "killWord", args: "left"},
        "C-k": "killLine",

        "C-y|S-Delete": "yank",
        "M-y": "yankRotate",
        "C-g": "keyboardQuit",

        "C-w|C-S-W": "killRegion",
        "M-w": "killRingSave",
        "C-Space": "setMark",
        "C-x C-x": "exchangePointAndMark",

        "C-t": "transposeletters",
        "M-u": "touppercase",    // Doesn't work
        "M-l": "tolowercase",
        "M-/": "autocomplete",   // Doesn't work
        "C-u": "universalArgument",

        "M-;": "togglecomment",

        "C-/|C-x u|S-C--|C-z": "undo",
        "S-C-/|S-C-x u|C--|S-C-z": "redo", // infinite undo?
        "C-x r": "selectRectangularRegion",
        "M-x": {command: "focusCommandLine", args: "M-x "}
    };


    exports.handler.bindKeys(exports.emacsKeys);

    exports.handler.addCommands({
        recenterTopBottom: function (editor) {
            var renderer = editor.renderer;
            var pos = renderer.$cursorLayer.getPixelPosition();
            var h = renderer.$size.scrollerHeight - renderer.lineHeight;
            var scrollTop = renderer.scrollTop;
            if (Math.abs(pos.top - scrollTop) < 2) {
                scrollTop = pos.top - h;
            } else if (Math.abs(pos.top - scrollTop - h * 0.5) < 2) {
                scrollTop = pos.top;
            } else {
                scrollTop = pos.top - h * 0.5;
            }
            editor.session.setScrollTop(scrollTop);
        },
        selectRectangularRegion: function (editor) {
            editor.multiSelect.toggleBlockSelection();
        },
        setMark: {
            exec: function (editor, args) {

                if (args && args.count) {
                    if (editor.inMultiSelectMode) editor.forEachSelection(moveToMark);
                    else moveToMark();
                    moveToMark();
                    return;
                }

                var mark = editor.emacsMark(),
                    ranges = editor.selection.getAllRanges(),
                    rangePositions = ranges.map(function (r) {
                        return {row: r.start.row, column: r.start.column};
                    }),
                    transientMarkModeActive = true,
                    hasNoSelection = ranges.every(function (range) {
                        return range.isEmpty();
                    });
                if (transientMarkModeActive && (mark || !hasNoSelection)) {
                    if (editor.inMultiSelectMode) editor.forEachSelection({exec: editor.clearSelection.bind(editor)});
                    else editor.clearSelection();
                    if (mark) editor.pushEmacsMark(null);
                    return;
                }

                if (!mark) {
                    rangePositions.forEach(function (pos) {
                        editor.pushEmacsMark(pos);
                    });
                    editor.setEmacsMark(rangePositions[rangePositions.length - 1]);
                    return;
                }

                function moveToMark() {
                    var mark = editor.popEmacsMark();
                    mark && editor.moveCursorToPosition(mark);
                }

            },
            readOnly: true,
            handlesCount: true
        },
        exchangePointAndMark: {
            exec: function exchangePointAndMark$exec(editor, args) {
                var sel = editor.selection;
                if (!args.count && !sel.isEmpty()) { // just invert selection
                    sel.setSelectionRange(sel.getRange(), !sel.isBackwards());
                    return;
                }

                if (args.count) { // replace mark and point
                    var pos = {row: sel.lead.row, column: sel.lead.column};
                    sel.clearSelection();
                    sel.moveCursorToPosition(editor.emacsMarkForSelection(pos));
                } else { // create selection to last mark
                    sel.selectToPosition(editor.emacsMarkForSelection());
                }
            },
            readOnly: true,
            handlesCount: true,
            multiSelectAction: "forEach"
        },
        killWord: {
            exec: function (editor, dir) {
                editor.clearSelection();
                if (dir == "left")
                    editor.selection.selectWordLeft();
                else
                    editor.selection.selectWordRight();

                var range = editor.getSelectionRange();
                var text = editor.session.getTextRange(range);
                exports.killRing.add(text);

                editor.session.remove(range);
                editor.clearSelection();
            },
            multiSelectAction: "forEach"
        },
        killLine: function (editor) {
            editor.pushEmacsMark(null);
            editor.clearSelection();
            var range = editor.getSelectionRange();
            var line = editor.session.getLine(range.start.row);
            range.end.column = line.length;
            line = line.substr(range.start.column);

            var foldLine = editor.session.getFoldLine(range.start.row);
            if (foldLine && range.end.row != foldLine.end.row) {
                range.end.row = foldLine.end.row;
                line = "x";
            }
            if (/^\s*$/.test(line)) {
                range.end.row++;
                line = editor.session.getLine(range.end.row);
                range.end.column = /^\s*$/.test(line) ? line.length : 0;
            }
            var text = editor.session.getTextRange(range);
            if (editor.prevOp.command == this)
                exports.killRing.append(text);
            else
                exports.killRing.add(text);

            editor.session.remove(range);
            editor.clearSelection();
        },
        yank: function (editor) {
            editor.onPaste(exports.killRing.get() || '');
            editor.keyBinding.$data.lastCommand = "yank";
        },
        yankRotate: function (editor) {
            if (editor.keyBinding.$data.lastCommand != "yank")
                return;
            editor.undo();
            editor.session.$emacsMarkRing.pop(); // also undo recording mark
            editor.onPaste(exports.killRing.rotate());
            editor.keyBinding.$data.lastCommand = "yank";
        },
        killRegion: {
            exec: function (editor) {
                exports.killRing.add(editor.getCopyText());
                editor.commands.byName.cut.exec(editor);
                editor.setEmacsMark(null);
            },
            readOnly: true,
            multiSelectAction: "forEach"
        },
        killRingSave: {
            exec: function (editor) {

                editor.$handlesEmacsOnCopy = true;
                var marks = editor.session.$emacsMarkRing.slice(),
                    deselectedMarks = [];
                exports.killRing.add(editor.getCopyText());

                setTimeout(function () {
                    function deselect() {
                        var sel = editor.selection, range = sel.getRange(),
                            pos = sel.isBackwards() ? range.end : range.start;
                        deselectedMarks.push({row: pos.row, column: pos.column});
                        sel.clearSelection();
                    }

                    editor.$handlesEmacsOnCopy = false;
                    if (editor.inMultiSelectMode) editor.forEachSelection({exec: deselect});
                    else deselect();
                    editor.session.$emacsMarkRing = marks.concat(deselectedMarks.reverse());
                }, 0);
            },
            readOnly: true
        },
        keyboardQuit: function (editor) {
            editor.selection.clearSelection();
            editor.setEmacsMark(null);
            editor.keyBinding.$data.count = null;
        },
        focusCommandLine: function (editor, arg) {
            if (editor.showCommandLine)
                editor.showCommandLine(arg);
        }
    });

    exports.handler.addCommands(iSearchCommandModule.iSearchStartCommands);

    var commands = exports.handler.commands;
    commands.yank.isYank = true;
    commands.yankRotate.isYank = true;

    exports.killRing = {
        $data: [],
        add: function (str) {
            str && this.$data.push(str);
            if (this.$data.length > 30)
                this.$data.shift();
        },
        append: function (str) {
            var idx = this.$data.length - 1;
            var text = this.$data[idx] || "";
            if (str) text += str;
            if (text) this.$data[idx] = text;
        },
        get: function (n) {
            n = n || 1;
            return this.$data.slice(this.$data.length - n, this.$data.length).reverse().join('\n');
        },
        pop: function () {
            if (this.$data.length > 1)
                this.$data.pop();
            return this.get();
        },
        rotate: function () {
            this.$data.unshift(this.$data.pop());
            return this.get();
        }
    };

});
